<?hh // strict
/**
 * Copyright (c) 2014, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the "hack" directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 */

trait MyTrait {
  public function id(): this {
    return $this;
  }
}

class C {
  use MyTrait;
}

function f(): C {
  return (new C())->id();
}
